APA (7th ed.) Citation

Foster, A. S., & Gifford, E. M. (1959). Comparative morphology of vascular plants. Freeman.

Chicago Style (17th ed.) Citation

Foster, Adriance Sherwood, and Ernest M. Gifford. Comparative Morphology of Vascular Plants. San Francisco, Calif: Freeman, 1959.

MLA (9th ed.) Citation

Foster, Adriance Sherwood, and Ernest M. Gifford. Comparative Morphology of Vascular Plants. Freeman, 1959.